Last couple of days my mailbox gets flooded by GBM notification like this:

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–playername-- has made a deposit to your GBM Contract.

They have deposited 1 units of Kelsalt, which has been deposited directly into your GSF.

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amounts vary between 1 and 30…

I wrote the player a mail, anything else that I could do to block these messages?

“Did you know that I get a GBM Deposit Notification for every deposit that you make? I do appreciate that you deposit , but I would appreciate even more if you would store those resources in you GSF and deposit less frequent!!!”